Complete Buying Guide: How to Choose a New 20-Foot Shipping Container (First Trip)

Why choose a new 20-foot container rather than a used one?

The 20-foot 'First Trip' shipping container, also called 'one trip', is a new container that has made only one commercial journey: it was loaded at the factory, crossed the seas, then was delivered to its destination port. Unlike a used container, it shows no advanced corrosion, no structural impact and no repairs. Its aesthetic and structural condition is flawless, making it a relevant choice for demanding professional use or a conversion project.

A used container, even in good condition, may have endured years of exposure in a marine environment, with risks of perforating rust, floor deformation or hardened door seals. The extra cost of a new one is often offset by a longer lifespan, better watertightness and a higher resale value. In addition, the new container is delivered with its original paint, without touch-ups, guaranteeing optimal anti-corrosion protection.

Finally, for visible use (events, site accommodation, commercial premises), the new appearance and uniform colour avoid painting or masking work. The new 20-foot container is therefore a durable investment, whether kept as is or converted.

Essential technical characteristics of the new 20-foot container

Dimensions and internal volume

The 20-foot container complies with ISO 668 and ISO 1496 standards. Its external dimensions are 6.06 m long, 2.44 m wide and 2.59 m high. Inside, there is about 5.90 m long, 2.35 m wide and 2.39 m high, giving a useful volume of about 33 m³. This capacity allows storing the equivalent of 10 to 11 European pallets on the floor, or more with rack storage.

The maximum gross mass (MGM) is generally 30,480 kg, with a tare between 2,200 and 2,400 kg depending on equipment. The maximum payload therefore approaches 28,000 kg, allowing storage of heavy materials (tools, machinery, construction materials) without risk of deformation.

Materials and construction

The structure is made of Corten steel, a low-alloy steel that develops a protective oxide layer on the surface, slowing atmospheric corrosion. This feature, combined with factory-applied paint, allows the container to withstand weather in urban, industrial or coastal environments, subject to minimal maintenance.

The floor is 28 mm marine plywood, a dense material treated against moisture. It easily supports pallets, handling trolleys, moderate-sized construction machinery or heavy furniture. The double rear doors are fitted with standard container locks, with vertical locking bars and operating handles. These doors open to about 270 degrees, providing a wide opening for loading.

Security and handling

A security lock box, called Lockbox, protects the locking point against common break-in attempts. This device is particularly recommended for storing sensitive equipment or goods. Forklift pockets integrated into the lower chassis facilitate ground handling, especially on sites where no hooklift truck or crane is available. The container can thus be moved by a forklift of suitable capacity.

Typical uses of the new 20-foot container

Visible and secure storage

On an industrial site, construction site or car park, the new 20-foot container allows storing materials, tools, spare parts or fragile equipment away from rain, wind and prying eyes. Its rigid structure and locking reinforced by the Lockbox form a first deterrent. For an individual, it can be used to store furniture, archives, leisure vehicles or garden equipment.

Site accommodation and site office

In the building and public works sector, the new 20-foot container is often used as site accommodation or site office. It allows storing power tools, consumables, PPE, or serving as a changing room and break room. Its uniform colour and new finish make it easy to integrate on a site subject to image requirements, for example in a city centre.

Events and scenography

The 20-foot container has become a common scenographic element: ticket office, dressing room, technical control room, food stand or display support. Its flat exterior surface is suitable for painting, wrapping or image projection. For temporary use, it can be rented or purchased, and its transport remains simple because it fits standard road dimensions.

Conversion base

The container can form a conversion base: site office, fitted storage room, workshop, break room, changing room, sanitary facilities, or even modular housing after insulation and interior fitting. In this case, it is advisable to provide suitable thermal insulation, ventilation, electrical supply and additional openings (doors, windows) made by a professional. The container structure is designed to bear heavy loads, but any cutting must be studied so as not to weaken the whole.

How to check the quality of a new 'First Trip' container?

When purchasing, several points deserve attention. First, check that the container is indeed a 'first trip' and not a repainted used container. A new container has a valid CSC (Convention for Safe Containers) marking, an ISO certification plate and a unique identification number. The seller must be able to provide these elements.

Then examine the sensitive points: door bottoms, threshold, structural corners, welds, floor. Even a new container may have suffered slight impacts during sea transport. A careful visual inspection can detect any deformations. It is also advisable to check watertightness, especially at the door seals, which must be flexible and free of cracks. Seals can be easily replaced if worn.

Ventilation is another important point: standard containers are not ventilated, which can cause condensation inside when temperatures vary. For storing moisture-sensitive materials, it is recommended to install vents or a dehumidifier.

Regulations and transport: what you need to know

Road transport

Transporting a 20-foot container in France is governed by regulations on vehicle weights and dimensions. A standard 20-foot container can be transported on a container truck or suitable trailer, without exceeding legal size limits, because its length (6.06 m) and width (2.44 m) remain compatible with approved vehicles. The authorised gross train weight must be respected, and the carrier must have the necessary permits where applicable.

For an individual, it is recommended to use a specialist carrier, equipped with a hooklift truck or container carrier, and to check access conditions to the delivery site: street width, presence of branches, slope, stable ground. An empty 20-foot container weighs about 2.3 tonnes, requiring appropriate lifting equipment.

Installation and planning

French regulations govern the installation of containers on private land. In most municipalities, a container used as a storage room or light dwelling may be subject to prior declaration of works, or even a building permit depending on its surface area, height and duration of installation. It is therefore recommended to check with the town hall's planning department before any permanent installation. For temporary use on a construction site, a declaration may also be required.

Maintenance and durability

Maintaining a new Corten steel container is simple but must be regular to preserve its longevity. It is advisable to inspect the surface at least twice a year, paying particular attention to water accumulation areas: door bottoms, threshold, lower corners, roof perimeter. Deep scratches that expose bare steel must be cleaned and repainted with an anti-rust paint suitable for metal surfaces.

Door seals must be checked and replaced if cracked or hardened, as they ensure water and air tightness. Locking mechanisms must be lubricated with water-resistant grease, at least once a year, to prevent jamming. The marine plywood floor can be cleaned with soapy water and protected with a wood stain or floor paint if the container is used intensively.

If storing chemicals or hazardous materials, compatibility and ventilation rules must be respected. For use in coastal areas, more frequent rinsing with clean water removes salt and limits corrosion. Finally, periodic verification of the CSC marking is mandatory for containers used in international transport, but it remains a good compliance indicator even for static use.

Comparison: new 20-foot vs other dimensions and types

The standard 40-foot container offers an internal volume of about 67 m³, double that of the 20-foot, with a length of 12.19 m. It is more suitable for storing large quantities or transporting bulky goods, but it requires more powerful lifting equipment and more manoeuvring space. The 40-foot high cube (HC) container adds about 30 cm of internal height, which is valuable for fitting out or storing tall loads, but it can cause size issues on certain routes.

The 10-foot container, more compact, is practical for small spaces, but its internal volume of about 15 m³ and its relative rarity often make it more expensive per cubic metre. The 20-foot container therefore represents a good compromise between capacity, footprint and handling cost.

Regarding types, the dry (standard) container is the most common and suits most dry goods storage and transport uses. The reefer container is equipped with a refrigeration unit and reinforced insulation for transporting perishable goods; it is heavier and more expensive, and requires a power supply. The open top container has an opening roof to load oversized goods from above. The flat rack container has no side walls or roof, allowing transport of heavy or bulky loads, but offers less weather protection. The high cube container, finally, stands out for its extra height. The 20-foot dry 'First Trip' container positions itself as the most versatile solution for static or mixed use, with a good balance between volume, robustness and ease of implementation.

Questions to ask before buying

If you are hesitating between several options, it is useful to define your need precisely: nature of goods to store, access frequency, installation constraints, budget, and possible evolution towards a fit-out. A new 20-foot container is often a relevant starting point, as it can be kept as is or gradually converted.

Also check colour availability: the container is delivered in standard RAL 5010 (blue) or RAL 7035 (grey), two neutral shades that blend easily into a professional or residential environment. Other colours may be considered depending on supplies, but blue and grey remain the most common for this type of product.

Finally, for any specific project, it is advisable to contact a container professional to validate the technical and regulatory aspects, and obtain a quote including delivery and installation.

Options and accessories to optimise your 20-foot container

A new 20-foot container can be fitted with many options to improve its comfort of use, security or functionality. Here are the main categories of available accessories.

Lighting and electricity

For frequent use, installing interior lighting (neon or LED) and power sockets is essential. A waterproof electrical panel with residual current circuit breaker allows powering tools, a space heater or an air conditioning system. These installations must be carried out by a qualified electrician, as metal walls require rigorous earthing. For simple storage, a battery lamp or solar lighting may suffice.

Ventilation and humidity management

Standard containers are not ventilated. To avoid condensation, especially if the container is used to store sensitive materials (paper, textiles, electronics), it is recommended to install wall or roof vents, or use an electric dehumidifier. Another solution is to place moisture absorbers (silica gel bags) and renew them regularly. For intensive use, mechanical ventilation (MVHR) can be considered.

Thermal insulation

If the container is to serve as an office, workshop or dwelling, insulation is necessary to limit heat loss in winter and overheating in summer. Mineral wool, extruded polystyrene or polyurethane panels are generally used, covered with an interior lining (plywood, panelling, plasterboard). Insulation must be continuous, including the floor and ceiling, to avoid thermal bridges. A professional can calculate the required thickness according to the climate zone.

Security and access control

Beyond the Lockbox, it is possible to install a high-security padlock, a key lock or an electronic locking system. For storing valuables, an anti-intrusion alarm with motion detector and external siren can be added. Protective grilles on vents prevent rodents and insects from entering. Finally, exterior lighting with a motion detector deters nighttime break-in attempts.

Interior fittings

To optimise storage, racks, shelves, hooks or cabinets can be installed. Floor covering (epoxy paint, rubber mat) protects the plywood floor and facilitates cleaning. If the container is used as a changing room or break room, benches, lockers, a table and chairs will be added. For food use, a washable wall covering and a water point are necessary.

Common mistakes to avoid when buying

Even a new container can hold surprises if a few precautions are not taken. Here are the most common mistakes.

• Confusing 'first trip' and 'new': a one trip container has travelled once, so it may show slight scratches or impacts. A truly new container (never used) is rarer and more expensive. Make sure of the exact definition before ordering.
• Neglecting access to the delivery site: a container truck needs sufficient manoeuvring space. Check the street width, presence of overhead cables, slope and ground bearing capacity. Soft ground may require spreader plates.
• Forgetting to provide blocks or crossbeams: placing the container directly on the ground encourages moisture accumulation and floor corrosion. Raised concrete blocks or wooden crossbeams are recommended.
• Underestimating the container's weight: with a tare of 2.2 to 2.4 tonnes, a 20-foot container cannot be moved by a simple low-capacity forklift. Provide suitable equipment (forklift of at least 3.5 to 5 tonnes).
• Neglecting planning procedures: permanent installation may require authorisation. Check before pouring a slab or carrying out works.

Total cost of ownership: beyond the purchase price

The purchase price of a new 20-foot container is an indicator, but the total cost of ownership includes other items. Delivery (transport and craning) must be planned, which can vary depending on distance and site accessibility. Installation on blocks or crossbeams represents a moderate but necessary cost. Options (electricity, insulation, ventilation) add a budget depending on the level of fitting out. Finally, routine maintenance (painting, greasing, seal replacement) must be budgeted annually, even if it remains low.

Conversely, a used container that is cheaper to buy can generate refurbishment costs (rust treatment, floor replacement, seals) and a shorter lifespan. For intensive professional use, the new container is often more cost-effective in the long term.

Conclusion: a durable and versatile choice

The 20-foot 'First Trip' shipping container combines the advantages of a new product, manufacturing compliant with international standards and great flexibility of use. Its Corten steel, 28 mm marine plywood floor, lockable doors with Lockbox and forklift pockets make it durable and practical equipment. Whether for storage, construction sites, events or conversion, it meets many needs with limited maintenance.

For any questions on availability, delivery or fitting options, it is recommended to contact a container professional, who can validate the technical and regulatory feasibility of your project.